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Chemtrails in the U.K 27 June 2010

  • Evpman
  • uploaded: Jun 27, 2010
  • Hits: 1592

7 comments

  • Bcgolddigger#

    Bcgolddigger August 17, 2010 10:51:58 PM CEST

    Condensation from engine exhaustThe main products of hydrocarbon fuel combustion are carbon dioxide and water vapor. At high altitudes this water vapour emerges into a cold environment, and the local increase in water vapor can push the water content of the air past saturation point. The vapour then condenses into tiny water droplets and/or deposits into ice. These millions of tiny water droplets and/or ice crystals form the vapour trail or contrails. The vapor's need to condense accounts for the contrail forming some way behind the aircraft's engines. At high altitudes, supercooled water vapor requires a trigger to encourage deposition or condensation. The exhaust particles in the aircraft's exhaust act as this trigger, causing the trapped vapor to rapidly turn to ice crystals. Exhaust vapour trails or contrails usually occur above 8000 meters (26,000 feet), where the temperature is below -40°C (-40°F).[3]Condensation from decreases in pressureMain article: Wingtip vorticesAs a wing generates lift, it causes a vortex to form at each wingtip, and sometimes also at the tip of each wing flap. These wingtip vortices persist in the atmosphere long after the aircraft has passed. The reduction in pressure and temperature across each vortex can cause water to condense and make the cores of the wingtip vortices visible. This effect is more common on humid days. Wingtip vortices can sometimes be seen behind the wing flaps of airliners during takeoff and landing, and during landing of the Space shuttle.The visible cores of wingtip vortices contrast with the other major type of contrails which are caused by the combustion of fuel. Contrails produced from jet engine exhaust are seen at high altitude, directly behind each engine. By contrast, the visible cores of wingtip vortices are usually seen only at low altitude where the aircraft is travelling slowly after takeoff or before landing, and where the ambient humidity is higher. They trail behind the wingtips and wing flaps rather than behind the engines.During high-thrust settings the fan blades at the intake of a turbo-fan engine reach transonic speeds, causing a sudden drop in air pressure. This creates the condensation fog (inside the intake) which is often observed by air travelers during takeoff. For more information see the Prandtl%u2013Glauert singularity effect.Information from: Wikipedia.

  • Evpman#

    Evpman June 27, 2010 5:53:13 PM CEST

    Thanks

  • Bobbyvvl#

    Bobbyvvl June 27, 2010 5:47:12 PM CEST

    good vid mate

  • Evpman#

    Evpman June 27, 2010 2:51:13 PM CEST

    I'm in Dagenham.Not usually up that early lol.I've seen one being illuminated by moonlight (sky dark approx 11 pm ) last year.Maybe it goes on throuout the night.

  • Crunchy#

    Crunchy June 27, 2010 2:32:53 PM CEST

    i live in brighton and a few days ago it was chemtrail city at 5 am (they seem to spray early morning over brighton) the trails were still hanging in the sky 2 hours later !i took some pics with my mobile phone but the sun was comming up so they are not so clear ... mainly parralell lines and one cross which had just been formed.

  • Crunchy#

    Crunchy June 27, 2010 2:32:53 PM CEST

    i live in brighton and a few days ago it was chemtrail city at 5 am (they seem to spray early morning over brighton) the trails were still hanging in the sky 2 hours later !i took some pics with my mobile phone but the sun was comming up so they are not so clear ... mainly parralell lines and one cross which had just been formed.



 
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